You're right, I am thinking about rolling the tail. I'd imagined that portions of the nose ended up in the roll, but actually thinking about the packjob clearly reveals that it doesn't (or shouldn't).

I have been using lots of small tight rolls on the tail, so on the next job I'm going to try some loose rolls. I don't want to have nasty short hard openings, just to open closer to the 800 feet side of my 800-1000 foot opening rather than the 1000 foot side.

So far the closed end cells have been symmetrical or symmetrical enough to be good to me so that I open without a spin. Had line twists once, but that was definitely body position, because I remember twisting a little to look behind me as I realized I was tracking away from the landing zone.